USGS Water-Year Summary for Site 04199000

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	Available Parameters
	00010 Temperature, water(Mean,Max.,Min.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Mean,Min.,Max.)
	00300 Dissolved oxygen(Min.,Max.,Mean)
	00400 pH(Min.,Med.,Max.)
	63680 Turbidity, Form Neph(Mean,Min.,Max.)

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

04199000 Huron River at Milan OH

LOCATION - Lat 41°18'03", long 82°36'30" referenced to North American Datum of 1927, Erie County, OH, Hydrologic Unit 04100012, on right bank, 500 ft downstream of U.S. Route 250 bridge, 2 mi downstream from confluence of East and West Branches.

DRAINAGE AREA - 371 mi².

REVISIONS HISTORY - WSP 1912: Drainage area. WDR OH-89-2: 1988.

SURFACE-WATER RECORDS

PERIOD OF RECORD - March 1950 to September 1980, October 1987 to current year.

GAGE - Water-stage recorder and crest stage gage. Datum of gage is 572.61 ft (NAVD 1988). Prior to October 1, 2013, datum of gage was 573.26 ft (NGVD 1929). October 1987 to May 2005 at site 500 ft upstream at (NGVD 1929); July 29, 1953 to Oct. 5, 1979, at site of former highway bridge at current site at (NGVD 1929); prior to July 29, 1953, non-recording gage at same site at (NGVD 1929).

REMARKS -

Discharge records fair for 2014, except for estimated records, which are poor. Oct. 1, 2014 to Dec. 3, 2014: discharge records fair. Dec. 3, 2014 to Mar. 18, 2015: discharge records fair, except for estimated records, which are poor. Mar. 18, 2015 to Oct. 21, 2015: discharge records fair. Oct. 21, 2015 to Apr. 5, 2016: discharge records fair, except for estimated records, which are poor. Apr. 5, 2016 to Sept. 14, 2016: discharge records good. Sept. 14, 2016 to Dec. 1, 2016: discharge records fair except for estimated records, which are poor Dec. 1, 2016 to Oct. 17, 2018: discharge records fair, except for estimated records, which are poor.

Record quality ratings may not be included in the water-year summary for approved records newer than 09/30/2018. Record quality is still being rated internally. For questions about record quality ratings, please send email to gs-w-oh_NWISWeb_Data_Inquiries@usgs.gov.

WATER-QUALITY RECORD: Aug. 31, 2017 to Dec. 12, 2018: Water temperature records good except Nov. 18, 2017 to Nov. 21, 2017, Jan. 11, 2018 to Jan. 13, 2018, Jan. 22, 2018 to Jan. 24, 2018, Feb. 15, 2018 to Feb. 17, 2018, Feb. 19, 2018 to Feb. 26, 2018, Mar. 1, 2018 to Mar. 3, 2018, Mar. 29, 2018 to Mar. 31, 2018, Apr. 3, 2018 to Apr. 4, 2018, Apr. 15, 2018 to Apr. 16, 2018, June 10, 2018 to June 12, 2018, Oct. 7, 2018, Oct. 28, 2018 to Oct. 29, 2018, Nov. 1, 2018 to Nov. 3, 2018, and Nov. 26, 2018, which are fair. Specific conductance records good except July 11, 2018 to Aug. 23, 2018, which are fair. pH records good except March 7, 2018 to Dec. 12, 2018, which are fair. Dissolved oxygen records good except March 7, 2018 to Dec. 12, 2018, which are fair. Turbidity records good except Oct. 5, 2017 to Oct. 12, 2017, and Apr. 25, 2018 to May 24, 2018, which are fair, and Sept. 6, 2017 to Sept. 21, 2017, Oct. 12, 2017 to Jan, 3, 2018, Apr. 5, 2018 to Apr. 25, 2018, May 25, 2018 to June 6, 2018, July 11, 2018 to Aug. 2, 2018, Aug. 23, 2018 to Sept. 4, 2018, and Nov. 7, 2018 to Dec. 12, 2018, which are poor.

WATER-QUALITY RECORDS

EXTREMES FOR PERIOD OF DAILY RECORD -

   Water Temperature:
     Maximum: 33.5°C, July 9, 2020.
     Minimum:  0.0°C, several days in winter months.

   Specific Conductance:
     Maximum: 1350 µs/cm, Jan. 9, 2018.
     Minimum: 156 µs/cm, Aug. 24, 2023.

   Dissolved Oxygen:
     Maximum: 16.8 mg/L, Dec. 8, 2019.
     Minimum: 2.7 mg/L, Nov. 8, 2017.

   pH:
     Maximum: 9.0 units, Apr. 22, 2018, Apr. 23, 2018
     Minimum: 7.2 units, May 19, 2020

   Turbidity:
     Maximum: 1,530 FNU, June 2, 2022.
     Minimum: 0.0 FNU, Sept. 25, 2019, Sept. 27, 2019, Oct. 13, 2019, and Oct. 19, 2019.